Envelope



Aug. 11, 1942. J. D. THOMSON ENVELOPE Filed July 22, 1940 Patentedjlug. 11, 1942 UNITED STATES oFF-ICE f ENVELOPE Joseph Dugald Thomson, Toronto, Ontario,

Canadam'j' l Application July 22, 1940,,fierial No. 346,878

V In Canada June l'i; 19510. r

2 Claims.

This invention relates to an envelope for mailing matter, embodying separate compartments forenclosing two classesof "matter, such as first classand other matter less than first class.

.The invention also relatesto an envelope of theduplex type of novel and improved design, whereby one of the compartments adapted to first class matter may be sealed and a second compartment whereby other than first class matter may be enclosed therewith, provided with a closure flap, adapted to prevent the contents from falling out, but readily accessible for postal inspection.

An object of the invention is to provide an envelope for enclosing two classes of mail matter, one class for sealing and the other class for partially open for inspection, provided with an open window to expose the address on the contents in the sealed compartment, thereby facilitating the one address for the two mail contents.

A further object of the invention is to produce a duplex envelope for two classes of mail matter, with means for sealing one class and the other accessible.

A further object of the invention is a duplex mailing envelope having one compartment embracing a partial width of the envelope and full length with a sealing flap for first class mail matter, and a second compartment-embracing the full width and length of the envelope, for a class of mail matter, such as catalogues, booklets, samples or other matter classified under a lower postage. The contents adapted to be retained in the compartment by an unsealable flap adapted to fold and tuck in the end of the compartment.

These features are hereinafter set forth and claimed and illustrated in the accompanying drawing in which- Figure 1 is a plan View of one of the blanks of the envelope opened out and showing the in-, side surface.

Figure 2 is a back view of the envelope, folded and sealed,

Figure 3 is a vertical sectional view on lines W-W, Figure 1.

Figure 4 is a vertical sectional view on lines Y-Y, Figure 2; and

Figure 5 is a transverse sectional view on lines X-X, Figure 2.

Like letters of reference refer to like parts throughout the several views.

The envelope is formed from a blank as shown in Figure 1, and comprises the front wall a embracing-the length and width of the envelope when folded and fastened together. h

The flaps h and c are adaptedto fold back over the front wall and seal together and form the backwall.oftheenvelope. w v

The, outer edge ofthey flap 0. is gummed and when folded in as shown in Figure 2 isi permanently secured to the flap b thereby sealing the flaps together permanently by which with the front wall a form the larger compartment Ill.

Formed on the lateral edge of the front wall a is a small flap c gummed along one edge, and adapted to fold over and seal to the top face of the flap c and partially close one end of the compartment Ill. Formed on the opposite edge of the front wall is a double fold flap f, and a designates a flap sheet of paper gummed along the inner edge to the back face of the back Wall flap b. The fiap sheet 9 protrudes beyond the lateral edge of the flap h and is adapted to fold in with the flap ,f, and tuck inside the end of the envelope larger compartment lll, after the class of mail matter adapted to the larger compartment has been inserted to retain the matter from displacement or dropping out.

The small compartment adapted to contain first class mail matter is formed by a sheet of paper l2, gummed to the back face of the front wall it along the lower and inner end, the front end of the sheet projecting a slight interval beyond the lateral edge of the front Wall proper, on the dotted lines I3 representing the score marks on the blank.

The top face of the projecting portion of the sheet I2 is gummed and adapted to be folded back on the lines l3 and seal with the back face of the flap b and thereby close the inner end of the large compartment In to the extent of the width of the flap h, and together with the small flap c conjointly close the entire inner end of the large compartment.

The flap it formed integral with the lateral edge of the front wall a is adapted to fold over the back wall to close and seal the smaller compartment l4, formed by the interposing sheet I2 and the back face of the front wall a.

The edge of the flap h is gummed with an adhesive substance to readily seal the flap for closing the compartment after the first class matter is inserted.

Formed in the front wall a is an elongated open slot positioned opposite the compartment I4 to expose the address imprinted on the letter or first class mail matter enclosed in the compartment- This form of envelope for mail matter provides for a relatively large compartment l0 and a smaller compartment M for two classes of mail matter, one compartment that may be sealed by the flap h and the other adapted to fold and tuck into the end of the compartment, and by which the contents of the envelope may be separated.

While I have shown the end of the sheet I2 gummed and secured to the back of the flap b, I may simply fold it back with the flap it without sealing.

What I claim as new, and desire to secure by Letters Patent is:

1. An envelope of the class specified comprising a substantially large compartment formed by the front wall thereof, and flaps formed along a the top and bottom edges therewith, folded over and permanently gummed together, with a small gummed flap formed on one end thereof for permanently sealing a portion of the inner end of said compartment, a flap formed along the accessible end of said compartment adapted to double fold with a flap sheet gummed to the underside of the back flap and tuck into the end of said large compartment, a smaller compartment formed and accessible from the opposite end of said front wall, said compartment being formed by a sheet of paper gummed along its bottom and back edges with the back face of said wall, with a gummed flap formed along the accessible edge thereof for sealing the said smaller compartment.

2. An envelope of the class specified comprising a substantially large compartment formed by the front wall thereof, and flaps formed along the top and bottom edges therewith, folded over and permanently gummed together, with a small gummed flap formed on one end thereof for permanently sealing a portion of the inner end of said compartment, a flap formed along the accessible end of the said compartment adapted to double fold with a flap sheet gummed to the underside of the back flap and tuck into the end of said compartment, a smaller compartment formed and accessible from the opposite end thereof, said compartment being formed by a sheet of paper gummed along its bottom and back edges with the back face of said wall, the outer edges of said sheet being gummed and adapted to seal against the outer face of the back flap and permanently seal the inner end of said large compartment with a gummed flap formed along the accessible edge thereof for sealing the smaller compartment after contents inserted.

JOSEPH DUGALD THOMSON. 

